Schistosomiasis is one of the most burdensome of the neglected tropical diseases. Praziquantel is a recommended drug for treatment against all forms of schistosomiasis. To investigate the interaction between praziquantel and Schistosoma japonicum cercariae, two praziquantel derivatives (PZQ-2 and PZQ-3) and one praziquantel fluorescent derivative (PZQ-5) have been synthesized and characterized using nuclear magnetic resonance spectroscopy (NMR) and MS spectra. The cytotoxicity of PZQ-2, PZQ-3 and PZQ-5 was measured by performing the methyl thiazolyl tetrazolium (MTT) assay. The cell viability for them shows that the three compounds exhibit low cytotoxicity to HeLa cells. Cell imaging experiments demonstrate that PZQ-5 is biocompatible and cell-permeable, which indicates that PZQ-5 is suitable for studying their interaction. Confocal fluorescence microscopy revealed that PZQ-5 is mainly located at the cercarial tegument, which leads to the death of cercariae with the increase in time.
血吸虫病是被忽视的热带疾病中最严重的疾病之一。
吡喹酮是治疗各种血吸虫病的推荐药物。为了研究
吡喹酮与日本血吸虫carcariae之间的相互作用,我们合成了两种
吡喹酮衍
生物(
PZQ-2 和
PZQ-3)和一种
吡喹酮荧光衍
生物(
PZQ-5),并利用核磁共振光谱(NMR)和质谱对其进行了表征。
PZQ-2、
PZQ-3 和
PZQ-5 的细胞毒性是通过甲基
噻唑基
四氮唑(M
TT)试验测定的。细胞存活率表明,这三种化合物对 HeLa 细胞的细胞毒性较低。细胞成像实验表明,
PZQ-5 具有
生物相容性和细胞渗透性,这表明
PZQ-5 适合研究它们之间的相互作用。共聚焦荧光显微镜显示,
PZQ-5 主要位于carcarial tegument,随着时间的延长,
PZQ-5 会导致carcariae 死亡。